There are numerous synonyms for the term "dirty" which include "unclean", "grimy", "soiled", "filthy", "muddy", "foul", "stained", "disheveled", "smudged", "tainted", "polluted", "contaminated", "blemished", "dingy" and "dusty". All of these words imply something that is impure or unhygienic, and often have negative connotations. The choice of word may depend on the context and the level of cleanliness being referred to. For example, "muddy" may describe something simply covered in mud, while "filthy" implies a high level of dirt and grime. Regardless of the exact word chosen, all synonyms for "dirty" evoke a sense of something needing to be cleaned or avoided.